81467429 has 2 divisors, whose sum is σ = 81467430. Its totient is φ = 81467428.

The previous prime is 81467381. The next prime is 81467479. The reversal of 81467429 is 92476418.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81414529 + 52900 = 9023^2 + 230^2 .

It is a cyclic number.

It is not a de Polignac number, because 81467429 - 2¹⁶ = 81401893 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81467479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40733714 + 40733715.

It is an arithmetic number, because the mean of its divisors is an integer number (40733715).

Almost surely, 2^81467429 is an apocalyptic number.

It is an amenable number.

81467429 is a deficient number, since it is larger than the sum of its proper divisors (1).

81467429 is an equidigital number, since it uses as much as digits as its factorization.

81467429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 41.

The square root of 81467429 is about 9025.9309215172. The cubic root of 81467429 is about 433.5055583002.

The spelling of 81467429 in words is "eighty-one million, four hundred sixty-seven thousand, four hundred twenty-nine".